problem in coexistence of wifi and bluetooth at a time
I use Ubuntu 18.04 on a dell inspiron 15 3537.
wifi and Bluetooth were working very well on my ubuntu device.
However recently I bought a new JBL headphone model MS-BT and when I connect to it with Bluetooth and play music on the headphones my wifi network speed drops down to almost to 0. It is connected but the speed decreases.
Solution 1:
Try this
sudo modprobe -r rtl8723be
sudo modprobe rtl8723be ant_sel=2
If your problem fixed then add this change permenently by
echo "options rtl8723be fwlps=0 ant_sel=2" | sudo tee -a /etc/modprobe.d/rtl8723be.conf
For more details